Hey everyone. I have a low oil pressure alert on my dash. This only happens after the truck warms up. I have owned this truck since day one and it`s never had great oil pressure but never had the "check gauges" light come on. When it does the oil pressure drops to almost zero.

I have changed the oil twice now with no solution. The truck runs and idles perfect and has never missed any maintenance, ever.

1990 Chevy 1/2 ton Silverado
5.0 V/8 TBI
2 wheel drive
150xxx miles

Runs like a champ but it did get pretty hot when my thermostat failed about a month ago. Seems to be about the same time this low oil pressure problem showed up.

I have searched all the other related topics on this program but haven`t found this particular problem addressed.